Question

To convert drams to grams, multiply the number of drams by which number?

Answer 1

"Dram" is a unit of volume, whereas "gram" is a unit of mass.
They can't be directly converted.  If they both refer to a sample
of some substance, then the conversion depends on the density
of the substance.  All we can say for sure by way of an answer is: 
To change 'drams' to 'grams', replace the 'd' with 'g'.